§1. Before an election begins, at least two tellers are to be designated from the membership of the college or group.
§2. The tellers are to collect the votes, to examine in the presence of the one presiding over the election whether the number of ballots corresponds to the number of electors, to count the votes themselves, and to announce openly how many votes each person has received.
§3. If the number of votes exceeds the number of electors, the voting is without effect.
§4. All the acts of an election are to be transcribed accurately by the secretary and are to be preserved carefully in the archive of the college after they have been signed at least by the same secretary, the one presiding, and the tellers.
Source: Code of Canon Law (Vatican.va)